Product Description Product DescriptionLogitech Wireless Combo MK520A sleek set for comfortable controlWith a roomy full-size keyboard, contoured laser mouse, and a single wireless receiver that connects them both to your computer, you’ve got convenience and control comfortably at your fingertips.Feel-good typingFull-size keyboard with palm rest for comfortable typing. Concave keys with softly rounded edges let your fingertips glide from key to key and barely make a sound.Power-efficient designWith up to three years of battery life for the keyboard and one year for the mouse, you hardly ever have to change batteries.** Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment. User experience may vary. Mouse battery life may vary based on user and computing conditions.Reliably robust connectionsLogitech Advanced 2.4 GHz wireless for powerful connectivity with virtually no delays or dropouts. 128-bit AES keyboard encryption – one of the highest levels of security available.Hand-friendly precisionContoured full-size laser mouse with soft rubber side grips. Smooth, accurate cursor control on just about any surface**** The laser sensor does not work on glass or mirrors.Plug it. Forget it. Add to it.One tiny Unifying receiver connects the keyboard, mouse, and other compatible devices like a number pad. No need to tie up your USB ports with multiple receivers. Stays in your computer so your keyboard and mouse are always ready to use.One-touch media keysChange volume, mute or skip to the next song instantly – without using your mouse.What you needWindows-based PC: Windows XP, Windows Vista, or Windows 7USB portInternet connectionBox Contains1 x Keyboard1 x Mouse1 x Logitech Unifying receiver3 x AA alkaline batteries (pre-installed)1 x Receiver extender cable1 x User documentation1 x Three-years limited hardware warranty